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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * AMD Cryptographic Coprocessor (CCP) driver4 *5 * Copyright (C) 2017 Advanced Micro Devices, Inc.6 *7 * Author: Gary R Hook <gary.hook@amd.com>8 */9 10#include <linux/debugfs.h>11#include <linux/ccp.h>12 13#include "ccp-dev.h"14 15/* DebugFS helpers */16#define OBUFP (obuf + oboff)17#define OBUFLEN 51218#define OBUFSPC (OBUFLEN - oboff)19#define OSCNPRINTF(fmt, ...) \20 scnprintf(OBUFP, OBUFSPC, fmt, ## __VA_ARGS__)21 22#define BUFLEN 6323 24#define RI_VERSION_NUM 0x0000003F25#define RI_AES_PRESENT 0x0000004026#define RI_3DES_PRESENT 0x0000008027#define RI_SHA_PRESENT 0x0000010028#define RI_RSA_PRESENT 0x0000020029#define RI_ECC_PRESENT 0x0000040030#define RI_ZDE_PRESENT 0x0000080031#define RI_ZCE_PRESENT 0x0000100032#define RI_TRNG_PRESENT 0x0000200033#define RI_ELFC_PRESENT 0x0000400034#define RI_ELFC_SHIFT 1435#define RI_NUM_VQM 0x0007800036#define RI_NVQM_SHIFT 1537#define RI_NVQM(r) (((r) * RI_NUM_VQM) >> RI_NVQM_SHIFT)38#define RI_LSB_ENTRIES 0x0FF8000039#define RI_NLSB_SHIFT 1940#define RI_NLSB(r) (((r) * RI_LSB_ENTRIES) >> RI_NLSB_SHIFT)41 42static ssize_t ccp5_debugfs_info_read(struct file *filp, char __user *ubuf,43 size_t count, loff_t *offp)44{45 struct ccp_device *ccp = filp->private_data;46 unsigned int oboff = 0;47 unsigned int regval;48 ssize_t ret;49 char *obuf;50 51 if (!ccp)52 return 0;53 54 obuf = kmalloc(OBUFLEN, GFP_KERNEL);55 if (!obuf)56 return -ENOMEM;57 58 oboff += OSCNPRINTF("Device name: %s\n", ccp->name);59 oboff += OSCNPRINTF(" RNG name: %s\n", ccp->rngname);60 oboff += OSCNPRINTF(" # Queues: %d\n", ccp->cmd_q_count);61 oboff += OSCNPRINTF(" # Cmds: %d\n", ccp->cmd_count);62 63 regval = ioread32(ccp->io_regs + CMD5_PSP_CCP_VERSION);64 oboff += OSCNPRINTF(" Version: %d\n", regval & RI_VERSION_NUM);65 oboff += OSCNPRINTF(" Engines:");66 if (regval & RI_AES_PRESENT)67 oboff += OSCNPRINTF(" AES");68 if (regval & RI_3DES_PRESENT)69 oboff += OSCNPRINTF(" 3DES");70 if (regval & RI_SHA_PRESENT)71 oboff += OSCNPRINTF(" SHA");72 if (regval & RI_RSA_PRESENT)73 oboff += OSCNPRINTF(" RSA");74 if (regval & RI_ECC_PRESENT)75 oboff += OSCNPRINTF(" ECC");76 if (regval & RI_ZDE_PRESENT)77 oboff += OSCNPRINTF(" ZDE");78 if (regval & RI_ZCE_PRESENT)79 oboff += OSCNPRINTF(" ZCE");80 if (regval & RI_TRNG_PRESENT)81 oboff += OSCNPRINTF(" TRNG");82 oboff += OSCNPRINTF("\n");83 oboff += OSCNPRINTF(" Queues: %d\n",84 (regval & RI_NUM_VQM) >> RI_NVQM_SHIFT);85 oboff += OSCNPRINTF("LSB Entries: %d\n",86 (regval & RI_LSB_ENTRIES) >> RI_NLSB_SHIFT);87 88 ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);89 kfree(obuf);90 91 return ret;92}93 94/* Return a formatted buffer containing the current95 * statistics across all queues for a CCP.96 */97static ssize_t ccp5_debugfs_stats_read(struct file *filp, char __user *ubuf,98 size_t count, loff_t *offp)99{100 struct ccp_device *ccp = filp->private_data;101 unsigned long total_xts_aes_ops = 0;102 unsigned long total_3des_ops = 0;103 unsigned long total_aes_ops = 0;104 unsigned long total_sha_ops = 0;105 unsigned long total_rsa_ops = 0;106 unsigned long total_ecc_ops = 0;107 unsigned long total_pt_ops = 0;108 unsigned long total_ops = 0;109 unsigned int oboff = 0;110 ssize_t ret = 0;111 unsigned int i;112 char *obuf;113 114 for (i = 0; i < ccp->cmd_q_count; i++) {115 struct ccp_cmd_queue *cmd_q = &ccp->cmd_q[i];116 117 total_ops += cmd_q->total_ops;118 total_aes_ops += cmd_q->total_aes_ops;119 total_xts_aes_ops += cmd_q->total_xts_aes_ops;120 total_3des_ops += cmd_q->total_3des_ops;121 total_sha_ops += cmd_q->total_sha_ops;122 total_rsa_ops += cmd_q->total_rsa_ops;123 total_pt_ops += cmd_q->total_pt_ops;124 total_ecc_ops += cmd_q->total_ecc_ops;125 }126 127 obuf = kmalloc(OBUFLEN, GFP_KERNEL);128 if (!obuf)129 return -ENOMEM;130 131 oboff += OSCNPRINTF("Total Interrupts Handled: %ld\n",132 ccp->total_interrupts);133 oboff += OSCNPRINTF(" Total Operations: %ld\n",134 total_ops);135 oboff += OSCNPRINTF(" AES: %ld\n",136 total_aes_ops);137 oboff += OSCNPRINTF(" XTS AES: %ld\n",138 total_xts_aes_ops);139 oboff += OSCNPRINTF(" SHA: %ld\n",140 total_3des_ops);141 oboff += OSCNPRINTF(" SHA: %ld\n",142 total_sha_ops);143 oboff += OSCNPRINTF(" RSA: %ld\n",144 total_rsa_ops);145 oboff += OSCNPRINTF(" Pass-Thru: %ld\n",146 total_pt_ops);147 oboff += OSCNPRINTF(" ECC: %ld\n",148 total_ecc_ops);149 150 ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);151 kfree(obuf);152 153 return ret;154}155 156/* Reset the counters in a queue157 */158static void ccp5_debugfs_reset_queue_stats(struct ccp_cmd_queue *cmd_q)159{160 cmd_q->total_ops = 0L;161 cmd_q->total_aes_ops = 0L;162 cmd_q->total_xts_aes_ops = 0L;163 cmd_q->total_3des_ops = 0L;164 cmd_q->total_sha_ops = 0L;165 cmd_q->total_rsa_ops = 0L;166 cmd_q->total_pt_ops = 0L;167 cmd_q->total_ecc_ops = 0L;168}169 170/* A value was written to the stats variable, which171 * should be used to reset the queue counters across172 * that device.173 */174static ssize_t ccp5_debugfs_stats_write(struct file *filp,175 const char __user *ubuf,176 size_t count, loff_t *offp)177{178 struct ccp_device *ccp = filp->private_data;179 int i;180 181 for (i = 0; i < ccp->cmd_q_count; i++)182 ccp5_debugfs_reset_queue_stats(&ccp->cmd_q[i]);183 ccp->total_interrupts = 0L;184 185 return count;186}187 188/* Return a formatted buffer containing the current information189 * for that queue190 */191static ssize_t ccp5_debugfs_queue_read(struct file *filp, char __user *ubuf,192 size_t count, loff_t *offp)193{194 struct ccp_cmd_queue *cmd_q = filp->private_data;195 unsigned int oboff = 0;196 unsigned int regval;197 ssize_t ret;198 char *obuf;199 200 if (!cmd_q)201 return 0;202 203 obuf = kmalloc(OBUFLEN, GFP_KERNEL);204 if (!obuf)205 return -ENOMEM;206 207 oboff += OSCNPRINTF(" Total Queue Operations: %ld\n",208 cmd_q->total_ops);209 oboff += OSCNPRINTF(" AES: %ld\n",210 cmd_q->total_aes_ops);211 oboff += OSCNPRINTF(" XTS AES: %ld\n",212 cmd_q->total_xts_aes_ops);213 oboff += OSCNPRINTF(" SHA: %ld\n",214 cmd_q->total_3des_ops);215 oboff += OSCNPRINTF(" SHA: %ld\n",216 cmd_q->total_sha_ops);217 oboff += OSCNPRINTF(" RSA: %ld\n",218 cmd_q->total_rsa_ops);219 oboff += OSCNPRINTF(" Pass-Thru: %ld\n",220 cmd_q->total_pt_ops);221 oboff += OSCNPRINTF(" ECC: %ld\n",222 cmd_q->total_ecc_ops);223 224 regval = ioread32(cmd_q->reg_int_enable);225 oboff += OSCNPRINTF(" Enabled Interrupts:");226 if (regval & INT_EMPTY_QUEUE)227 oboff += OSCNPRINTF(" EMPTY");228 if (regval & INT_QUEUE_STOPPED)229 oboff += OSCNPRINTF(" STOPPED");230 if (regval & INT_ERROR)231 oboff += OSCNPRINTF(" ERROR");232 if (regval & INT_COMPLETION)233 oboff += OSCNPRINTF(" COMPLETION");234 oboff += OSCNPRINTF("\n");235 236 ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff);237 kfree(obuf);238 239 return ret;240}241 242/* A value was written to the stats variable for a243 * queue. Reset the queue counters to this value.244 */245static ssize_t ccp5_debugfs_queue_write(struct file *filp,246 const char __user *ubuf,247 size_t count, loff_t *offp)248{249 struct ccp_cmd_queue *cmd_q = filp->private_data;250 251 ccp5_debugfs_reset_queue_stats(cmd_q);252 253 return count;254}255 256static const struct file_operations ccp_debugfs_info_ops = {257 .owner = THIS_MODULE,258 .open = simple_open,259 .read = ccp5_debugfs_info_read,260 .write = NULL,261};262 263static const struct file_operations ccp_debugfs_queue_ops = {264 .owner = THIS_MODULE,265 .open = simple_open,266 .read = ccp5_debugfs_queue_read,267 .write = ccp5_debugfs_queue_write,268};269 270static const struct file_operations ccp_debugfs_stats_ops = {271 .owner = THIS_MODULE,272 .open = simple_open,273 .read = ccp5_debugfs_stats_read,274 .write = ccp5_debugfs_stats_write,275};276 277static struct dentry *ccp_debugfs_dir;278static DEFINE_MUTEX(ccp_debugfs_lock);279 280#define MAX_NAME_LEN 20281 282void ccp5_debugfs_setup(struct ccp_device *ccp)283{284 struct ccp_cmd_queue *cmd_q;285 char name[MAX_NAME_LEN + 1];286 struct dentry *debugfs_q_instance;287 int i;288 289 if (!debugfs_initialized())290 return;291 292 mutex_lock(&ccp_debugfs_lock);293 if (!ccp_debugfs_dir)294 ccp_debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);295 mutex_unlock(&ccp_debugfs_lock);296 297 ccp->debugfs_instance = debugfs_create_dir(ccp->name, ccp_debugfs_dir);298 299 debugfs_create_file("info", 0400, ccp->debugfs_instance, ccp,300 &ccp_debugfs_info_ops);301 302 debugfs_create_file("stats", 0600, ccp->debugfs_instance, ccp,303 &ccp_debugfs_stats_ops);304 305 for (i = 0; i < ccp->cmd_q_count; i++) {306 cmd_q = &ccp->cmd_q[i];307 308 snprintf(name, MAX_NAME_LEN - 1, "q%d", cmd_q->id);309 310 debugfs_q_instance =311 debugfs_create_dir(name, ccp->debugfs_instance);312 313 debugfs_create_file("stats", 0600, debugfs_q_instance, cmd_q,314 &ccp_debugfs_queue_ops);315 }316 317 return;318}319 320void ccp5_debugfs_destroy(void)321{322 debugfs_remove_recursive(ccp_debugfs_dir);323}324